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电网技术  2014 

不对称电压条件下光伏逆变器的控制策略

DOI: 10.13335/j.1000-3673.pst.2014.05.023, PP. 1277-1282

Keywords: 输出电流参考值,瞬时有功无功控制,平均有功无功控制,功率波动,比例谐振控制器

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Abstract:

针对不对称电压条件下光伏逆变器的控制,在瞬时有功无功控制(instantaneousactive-reactivecontrol,IARC)和平均有功无功控制(averageactivereactivecontrol,AARC)算法的基础上,提出一种有功无功灵活控制方法。该方法在电流参考值表达式中引入一个变量,通过对该变量的调节来抑制有功、无功功率波动和输出电流谐波。为获得较好的动态性能,仿真中采用静止坐标系下的比例谐振(proportional-resonant,PR)控制器实现正负序同时控制。仿真结果验证了所提策略的有效性。

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